Distance calculations are the one thing I
haven't really been able to nail down how to do because each airline seems to calculate
things differently. We all know that LAX->JFK
is AROUND 2500 miles. But is it 2488 or 2491?
Or 2502?
Similarily SFO->SYD is again, AROUND 7500 miles. UA measures it 7487, QT 7523 and
I seem to recall ITN listing it as 7497 at
one point. Who's right?
Whatever the airline you're flying on that day is most likely the answer 'cause thats what you're going to get credit for.

It's this sort of quandry thats got me thinking a simple post-facto calculator approach would be a good first whack at the problem. I wouldn't want to be responsible for somebody missing a Medallion or 1K level
of status 'cause I was providing the wrong #s.

Does anybody out there know how the airlines
calculate their segments?
Is it maybe on a web site somewhere?

Bonus/premium calculations and the like are
comparatively easy as they are a function of the above mileage figures. Likewise threshold calculations are a snap as well.

Travelcrazy: You've been reading my mind. Just about all the features you've listed are
ones I've been thinking of myself. It seems like a big part of the question is where to get the data from...